Question a 28 g bullet pierces a sand bag 30 cm thick if, Ask an Expert

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Question: A 28 g bullet pierces a sand bag 30 cm thick. If the initial velocity was 55 m/s and it emerged from the sand bag with a velocity of 18 m/s,

Part A: What is the magnitude of the friction force (assuming it to be constant) the bullet experienced while it traveled through the bag?

I want help to find the magnitude of the friction force (assuming it to be constant) the bullet experienced while it traveled through the bag.

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